Algae

Question 1

Kingdom:

Answer 1

Protista

Question 2

Nutritional type:

Answer 2

Photoautotroph

Question 3

Multicellularity:

Answer 3

Some

Question 4

Food acquisition method:

Answer 4

Absorptive

Question 5

Cellular arrangement:

Answer 5

Unicellular, colonial, filamentous, tissues

Question 6

Characteristic features:

Answer 6

Sexual and asexual spores

Question 7

Embryo formation:

Answer 7

None

Question 8

single-celled synchronized swimmer

Answer 8

Volvox

Question 9

the body of a multicellular alga

Answer 9

Thallus

Question 10

branched; anchor the alga to a substrate

Answer 10

holdfasts

Question 11

stemlike and often hollow that connects the blade to the holdfast not lignified or woody, so it does not offer the support of a plant’s stem; instead, the
surrounding water supports the algal thallus

Answer 11

stipes

Question 12

leaflike

Answer 12

blades

Question 13

floating, gas-filled bladder that buoys some algae

Answer 13

Pneumatocyst

Question 14

a brown alga.

Answer 14

Macrocystis porifera,

Question 15

a red alga.

Answer 15

Microcladia,

Question 16

The delicately branched red algae get their color from

Answer 16

phycobiliprotein accessory pigments.

Question 17

Mulঞcellular algae with thalli and filamentous forms can fragment; each piece is capable of forming

Answer 17

a new thallus or filament.

Question 18

All algae can reproduce asexually. (true or false)

Answer 18

True

Question 19

When a unicellular alga divides,

Answer 19

its nucleus divides (mitosis),

Question 20

Some algae can reproduce sexually. (true or false)

Answer 20

true

Question 21

are therefore found throughout the ______ zone bodies of water.

Answer 21

photic (light)

Question 21

Algae are what? (Nutrition)

Answer 21

photoautotrophs

Question 22

used to induce vaginal dilation before surgical entry into the uterus through the vagina

Answer 22

Laminaria japonica

Question 22

macroscopic; some reach lengths of 50 m; used in the production of algin and variety of non-food goods

Answer 22

Brown Algae (or kelp)

Question 23

are used for food; some member, however, can produce a lethal toxin

Answer 23

Gracilaria

Question 23

have delicately branched thalli; can live at greater ocean depths than other algae used to extract agar (used in microbiological media) and carrageenan as thickening ingredient in evaporated milk, ice cream, and pharmaceutical agents

Answer 23

Red Algae

Question 24

have cellulose cell walls; contain chlorophyll a and b; store starch most are microscopic, although they may be either unicellular or multicellular

Answer 24

Green Algae

Question 25

unicellular or filamentous algae with complex cell walls that consist of pectin and a layer of silica; the two parts of the wall fit together like the halves of a Petri dish; store energy captured through photosynthesis in the form of oil

Answer 25

Diatom

Question 26

diatom produces domoic acid which?

Answer 26

a neurotoxin that causes amnesic shellfish poisoning;

Question 26

when was the first reported outbreak of a neurological disease caused by diatoms in Canada

Answer 26

1987

Question 27

a neurotoxin that causes amnesic shellfish poisoning

Answer 27

domoic acid

Question 28

unicellular algae collectively called plankton; has rigid structure due to cellulose embedded in the plasma membrane

Answer 28

Dinoflagellates

Question 29

produces neurotoxins:

Answer 29

Dinoflagellates

Question 30

Karenia brevis produce that causes massive fish kills

Answer 30

brevetoxins

Question 31

genus ________, in large concentrations give the ocean a deep red color

Answer 31

Alexandrium

Question 32

causes paralytic shellfish poisoning (PSP);

Answer 32

saxitoxins

Question 33

Gambierdiscus toxicus produces ciguatoxin that causes

Answer 33

ciguatera

Question 34

Seasonal changes in nutrients, light, and temperature cause fluctuations in algal populations; periodic increases in numbers of planktonic algae are called

Answer 34

algal blooms.

Question 35

are responsible for seasonal red tides.

Answer 35

Blooms of dinoflagellates

Question 36

was formed from diatoms and other planktonic organisms that lived several million years ago.

Answer 36

Petroleum

Question 37

Many unicellular algae are symbionts in animals. (true or false)

Answer 37

true